c_meyer/pxt-calliope
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

moving neopixel state to pxt

Browse Source
This commit is contained in:
Peli de Halleux
2016-09-13 13:09:02 -07:00
parent 72a621ec8b
commit e59ae37954
2 changed files with 3 additions and 84 deletions
Download Patch File Download Diff File Expand all files Collapse all files

48
sim/state/neopixel.ts
View File

@ -4,54 +4,10 @@ namespace pxsim {
if (b) {
let np = b.neopixelState;
if (np) {
np.updateBuffer(buffer, pin);
let buf = <Uint8Array[]>(<any>buffer).data;
np.updateBuffer(buf, pin);
runtime.queueDisplayUpdate();
}
}
}
}
namespace pxsim {
export enum NeoPixelMode {RGB, RGBW};
export type RGBW = [number, number, number, number];
function readNeoPixelBuffer(inBuffer: Uint8Array[], outColors: RGBW[], mode: NeoPixelMode) {
let buf = inBuffer;
let stride = mode === NeoPixelMode.RGBW ? 4 : 3;
let pixelCount = Math.floor(buf.length / stride);
for (let i = 0; i < pixelCount; i++) {
// NOTE: for whatever reason, NeoPixels pack GRB not RGB
let r = buf[i * stride + 1] as any as number
let g = buf[i * stride + 0] as any as number
let b = buf[i * stride + 2] as any as number
let w = 0;
if (stride === 4)
w = buf[i * stride + 3] as any as number
outColors[i] = [r, g, b, w]
}
}
export class NeoPixelState {
private buffers: {[pin: number]: Uint8Array[]} = {};
private colors: {[pin: number]: RGBW[]} = {};
private dirty: {[pin: number]: boolean} = {};
public updateBuffer(buffer: Buffer, pin: DigitalPin) {
//update buffers
let buf = <Uint8Array[]>(<any>buffer).data;
this.buffers[pin] = buf;
this.dirty[pin] = true;
}
public getColors(pin: number, mode: NeoPixelMode): RGBW[] {
let outColors = this.colors[pin] || (this.colors[pin] = []);
if (this.dirty[pin]) {
let buf = this.buffers[pin] || (this.buffers[pin] = []);
readNeoPixelBuffer(buf, outColors, mode);
this.dirty[pin] = false;
}
return outColors;
}
}
}